Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: davidwpack on July 29, 2017, 06:20:42 pm

Title: Learning circuits
Post by: davidwpack on July 29, 2017, 06:20:42 pm

I happened on this site while searching for info on nfb circuits. Thought others, particularly novices like myself would find this very helpful.  http://www.learnabout-electronics.org/index.php (http://www.learnabout-electronics.org/index.php)

{EDIT= munged URL -PRR}

Title: Re: Learning circuits
Post by: PRR on July 30, 2017, 07:31:59 pm

Looks like a good site.

Title: Re: Learning circuits
Post by: dpm309 on August 03, 2017, 12:52:39 pm

Great site! Wish I had this several years ago when I started dabbling in amp repairs and builds.

Title: Re: Learning circuits
Post by: Ed_Chambley on August 03, 2017, 01:00:51 pm

I to am looking at NFB circuits.  In reading about Push Pull 300B amp designs, it seems desirable to reduce/remove NFB/Dampening.  It seems you increase the reflected impedance of the OT which goes against learning how to calculate NFB values.  I do to quite get it yet as I just started reviewing the idea.


BTW, thanks for the link.  Looks like good info.

Title: Re: Learning circuits
Post by: davidwpack on August 03, 2017, 01:15:07 pm

No problem. I thought a lot of people could benefit from it. You could probably pay a few thousand dollars for the free education that's on there. I like how it quizzes you at the end of each section. A lot of it's still over my head but I'm learning.